A South Dakota man who brandished a stockpile of guns on Facebook Live outside of a Christian conservative conference, warning viewers to “be scared,” has been charged with making a terrorist threat — after authorities initially said he committed no crime.

Ehab Abdulmutta Jaber, 45, was arrested Friday, weeks after streaming his threats while he was parked outside of a packed anti-Islam event at a Hilton hotel in Sioux Falls.

Jaber walked into the April 9 conference “Sabotaging America: Islam’s March Towards Supremacy” — organized by the Christian group Worldview Weekend — and recorded himself holding a copy of the Koran.

Ehab Jaber in his Facebook Live video.

(YouTube)

Security guards at the Hilton Garden Inn South kicked him out, believing he was packing weapons, police said.

“He didn't break any laws so we didn't charge him. It would have been a different story if he had threatened anybody.”

But after speakers from the conference pressed police for charges, officers eventually arrested him on one count of terrorist threat. During a search of Jaber’s home, officers found firearms as well as methamphetamine.

He faces up to five years in prison, and could see additional charges for the drugs in his home.

Jaber’s arrest came the same week a killer in Cleveland, Steve Stephens, posted footage of himself murdering a stranger on Facebook and then threatened more violence in a Facebook Live rant. Stephens remained on the run for two days before killing himself during a police pursuit in Pennsylvania.